Abstract

A mathematical model is used to simulate the flow of porewater during the evolution of a sedimentary basin. The dynamic evolution of the geometry and facial distribution of the deposit as well as flow rates, directions and cumulative porewater movement are calculated. Simulation of transport of sediment is performed with a revised version of a 2-D model published by BITZER & HARBAUGH (1987). Porewater flow is simulated with a potential flow model, which takes into account the changes in porosity and hydraulic conductivity of sediment caused by compaction. Experiments show that flow rates and directions are mainly influenced by the locations of depositional centers, showing flow directions into those parts of the deposit with lower sedimentation rates and compaction. Sandy layers interfingered with shale act as drainages of porewater and show increased cumulative porewater movement.